Door spindle key lock



March 21, 1950 c, GARRISQN 2,501,505 DOOR SPINDLE KEY LOCK Filed Sept.27, 1947 IN VEN TOR.

FORREST GARRISON ATT'YS Patented Mar. 21, 1950 Forrest -C.;Garrison,-.Eort Myers,.Fla., :assignor to .EEhe'OScar 0.,Rixson 00.,.Ghicago, 1111., :a :cor-

norationoflllin i Application-September 27, 1947, Serial No. 7%;579

1 fllhis invention relates :to :means for mounting a "door :upon the(spindle-of a door .oheokinmand closing device, especially in:situations where-:the operating mechanism visslocated in a recess inthe floor and where the main spindle of that mechanism carries theweight of the door.

Themain object of this ,inventionris .to provide a simplified andimproved form of key ;connec tion between the spindle and the hinge armmember on the door, whichprovides for a degree of verticalzadjustment ofthe;door upon the :spindle and: at the same time locks .this member to rthe spindle gsoias to prevent eitherrelative :rotation or relativeyertical shifting "of :thewmemher with respect to the spindle.

A specific embodiment of this invention is shown in the accompanyingdrawings in which;

Figure 1 is a top view, partly broken away, of the joint between thespindle and hinge arm member.

Fig. 2 is an elevation of the same with parts in section on the line 22of Fig. 1.

Fig. 3 is a perspective view of the key.

A general arrangement of door check mechanism to which this invention isparticularly applicable is shown in applicants Patent No. 1,832,699 ofNovember 17, 1931.

In the form shown in the drawings, the spindle i is the upper endportion of a crank shaft that is journalled in a casing (not shown) andconnects the door with its closing and checking mechanism which isembedded in the floor as described in said patent.

In the present invention the spindle is connected to the door by meansof a hinge plate comprising a hub 2 having a bore 3 fitting the spindlel and having arm 4 that is mortised into the bottom of the door. Acylindrically curved keyway 5 is cut into one side of the spindleadjacent its upper end, its transverse elements being 01 like circularcurvature and its longitudinal elements being straight and parallel tothe axis of the spindle, so that this keyway can be formed by a drillmoving parallel to the axis of the spindle. This keyway 5 forms a seatfor a cylindrical key 6 and terminates in a shoulder 1 at its lower endthat forms a ledge for the key to rest upon.

The key 6 may be formed by cutting a piece of cylindrical rod stock tosuitable length and removing a portion at one'side to form a flatinclined wedge face 8. Adjacent the smaller or upper end of the key,there may be a notch 9 to facilitate removal of the key from its keywayby means of a suitable implement.

The hub also :has ;a.:keyw'ay i0 .in-z position to register with thekeyway 5 :to accommodate the "@key :6. L'Ifhe .keyway 1.5 in the:spi-ndle.;accurately Ffits 'the cylindrical body of :the key-:6 butrthe..-keyway iii) :in the chub-sis .madesomewhat larger: in crosssectional. areato:permitathevready insertion and removal of thelkeynfiwhilerthe spindle;.isiiniposition withinithe hub.

:ilihe-ikeyiis placed inrthe ways in ,such1position that vzthe :narrowend of v:its wedge-shaped ibody' is ;at :theatop-iso "that the ';fiatsurface 18 ithereof slopes 'zdownward .and ioutward :from the :axis ofthesspi'ndle.

:Azsetsorew lri :is threaded into .the :hub 2 in Such :an ;.inclinediposition'zthat its .axis .is :approximately tangent to the periphery ofthe spindle and normal to the inclined surface of the key 6.

In operation, after the door closing mechanism, represented by thespindle l, is set in its fixed position in the floor, the arm 4 of thehinge member is mortised into the bottom of the door and then placedupon the upstanding end of the spindle I. When the door is in its closedposition, the keyways in the spindle and hub 2 will be in approximateregistry with each other.

The key 6 is then dropped into the keyways with its large end at thebottom and resting on the shoulder T on the spindle. The door is thenaccurately adjusted in height and the set screw II is set up to beartightly against the flat inclined wedge face of the key 6. The setscrew, being substantially tangential to the periphery of the spindle,presses the key laterally against a shoulder portion of the wall of thekeyway in that converges toward the axis of the spindle. Thus the setscrew produces a rotary wedging effect that locks the spindle firmlyagainst any possibility of rotation relative to the hub 2 and. forcesthe key 6 into firm lateral clamping engagement with the channel wallsof both keyways 5 and I0; also since the axis of the set screw is normalto the inclined flat face 8 of the key, the Weight of the doorsupplements the thrust of the said screw in such manner as to lock thespindle l and hub 2 against both vertical and rotary relative shifting.

Although but one specific embodiment of this invention is herein shownand described, it willv be understood that numerous details of thestructure shown may be altered or omitted without departing from thespirit of the invention as defined by the following claims.

I claim:

1. A door check spindle fastening, compris- ,ing a vertical spindlehaving a cylindrical top portion with a cylindrical keyway in one side,which keyway has its transverse elements of circular curvature and itsvertical elements straight and parallel with the axis of said spindle, aledge formed at the lower end of said keyway, a door hinge arm having ahub bored to fit said spindle and having a keyway extending through saidhub in one side of said bore and providing a shoulder opposed to thekeyway in said spindle and inclined laterally toward said spindle, a keyin said keyways, resting on said ledge and having a cylindrical bodylongitudinally beveled to form a vertically inclined face opposed tosaid shoulder, and a set screw threaded in said hub in position to bearon said inclined face in a direction normal thereto and between saidshoulder and said spindle.

' 2. A door check spindle fastening, compris ing a vertical spindlehaving a cylindrical portion, a door hinge arm having a hub bored to fitsaid cylindrical portion, a keyway of circular cross section in one sideof said spindle portion, having a key supporting ledge at its lower end,

a keyway in said hub registering with the keythreaded in said hub inposition to bear on said fiat surface portion of the key in a directionnormal thereto and between the spindle and said wall surface portion ofthe keyway.

3. A door check spindle fastening, comprising a vertical spindle havinga cylindrical top portion, a door hinge arm having a hub bored to fitsaid spindle top portion, a keyway extending vertically in one side ofsaid spindle at its upper end, said keyway having its surface made up ofcircularly curved transverse elements and straight vertical elements,and terminating at its lower end in a ledge to support a key, a keywayin said hub forming a shoulder laterally inclined toward said spindle, akey seated in said keyways so as to rest on said ledge and having acylindrical body longitudinally beveled to form a vertically inclinedface opposed to the keyway in said hub, and a set screw threaded in saidhub and bearing on said inclined face in a direction substantiallytangent to the periphery of said spindle top portion and substantiallynormal to said inclined key face.

FORREST C. GARRISON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 198,481 Woodbury Dec. 25, 18771,574,735 Paloski Feb. 23, 1926 2,004,187 Bummer June 11, 1935

